运算方法如下:
29×97+(29-4)×3
=29×(97+3)-4×3
=29×100-12
=2900-12
=2888
原式=(25+4)×97+25×3
=25×97+4×97+25×3
=25×(97+3)+4×97
=25×100+388
=2888
简便计算
29x97+25x3
=29x97+29x3-4x3
=29ⅹ(97+3)-12
=29x100-12
=2900-12
=2888
原式=(30-1)x97+
(30-5)x3
=30x(97+3)-97-15
=3000-112
=2888